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FloatBuffer get() methods in Java with Examples

  • Last Updated : 24 May, 2019
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get()

The get() method of java.nio.FloatBuffer Class is used to reads the float at the given buffer’s current position, and then increments the position.

Syntax :

public abstract float get()

Return Value: This method returns the float value at the buffer’s current position.

Throws: This method throws BufferUnderflowException – If the buffer’s current position is not smaller than its limit, then this exception is thrown.

Below are the examples to illustrate the get() method:



Examples 1:




// Java program to demonstrate
// get() method
  
import java.nio.*;
import java.util.*;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // Declaring the capacity of the FloatBuffer
        int capacity = 5;
  
        // Creating the FloatBuffer
        try {
  
            // creating object of floatbuffer
            // and allocating size capacity
            FloatBuffer fb = FloatBuffer.allocate(capacity);
  
            // putting the value in floatbuffer
            fb.put(8.56F);
            fb.put(9.61F);
            fb.put(1.24F);
            fb.rewind();
  
            // print the FloatBuffer
            System.out.println("Original FloatBuffer:  "
                               + Arrays.toString(fb.array()));
  
            // Reads the float at this buffer's current position
            // using get() method
            float value = fb.get();
  
            // print the Float value
            System.out.println("\nFloat Value: " + value);
  
            // Reads the  float at this buffer's next position
            // using get() method
            float value1 = fb.get();
  
            // print the Float value
            System.out.print("\nNext Float Value: " + value1);
        }
  
        catch (IllegalArgumentException e) {
  
            System.out.println("\nIllegalArgumentException catched");
        }
  
        catch (ReadOnlyBufferException e) {
  
            System.out.println("\nReadOnlyBufferException catched");
        }
  
        catch (BufferUnderflowException e) {
  
            System.out.println("\nException throws: " + e);
        }
    }
}
Output:
Original FloatBuffer:  [8.56, 9.61, 1.24, 0.0, 0.0]

Float Value: 8.56

Next Float Value: 9.61

Examples 2:




// Java program to demonstrate
// get() method
  
import java.nio.*;
import java.util.*;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // Declaring the capacity of the FloatBuffer
        int capacity = 3;
  
        // Creating the FloatBuffer
        try {
  
            // creating object of floatbuffer
            // and allocating size capacity
            FloatBuffer fb = FloatBuffer.allocate(capacity);
  
            // putting the value in floatbuffer
            fb.put(8.56F);
            fb.put(9.61F);
  
            // print the FloatBuffer
            System.out.println("Original FloatBuffer:  "
                               + Arrays.toString(fb.array()));
  
            // Reads the float at this buffer's current position
            // using get() method
            float value = fb.get();
  
            // print the Float value
            System.out.println("\nFloat Value: " + value);
  
            // Reads the  float at this buffer's next position
            // using get() method
            System.out.print("\nsince the buffer current position is incremented");
            System.out.print(" to greater than its limit ");
  
            float value1 = fb.get();
  
            // print the Float value
            System.out.print("\nNext Float Value: " + value1);
        }
  
        catch (IllegalArgumentException e) {
  
            System.out.println("\nIllegalArgumentException catched");
        }
  
        catch (ReadOnlyBufferException e) {
  
            System.out.println("\nReadOnlyBufferException catched");
        }
  
        catch (BufferUnderflowException e) {
  
            System.out.println("\nException throws : " + e);
        }
    }
}
Output:
Original FloatBuffer:  [8.56, 9.61, 0.0]

Float Value: 0.0

since the buffer current position is incremented to greater than its limit 
Exception throws : java.nio.BufferUnderflowException

get(int index)

The get(int index) method of FloatBuffer is used to read the article at a specified index.

Syntax :

public abstract float get(int index)

Parameters: This method takes index (The index from which the float will be read) as a parameter.

Return Value: This method returns the float value at the given index.



Exception: This method throws IndexOutOfBoundsException. If index is negative or not smaller than the buffer’s limit this exception is thrown.

Below are the examples to illustrate the get(int index) method:

Examples 1:




// Java program to demonstrate
// get(int index) method
  
import java.nio.*;
import java.util.*;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // Declaring the capacity of the FloatBuffer
        int capacity = 3;
  
        // Creating the FloatBuffer
        try {
  
            // creating object of floatbuffer
            // and allocating size capacity
            FloatBuffer fb = FloatBuffer.allocate(capacity);
  
            // putting the value in floatbuffer
            fb.put(8.56F);
            fb.put(9.61F);
            fb.put(6.61F);
  
            // print the FloatBuffer
            System.out.println("Original FloatBuffer:  "
                               + Arrays.toString(fb.array()));
  
            // Reads the float at the index 0 of the floatbuffer
            // using get() method
            float value0 = fb.get(0);
  
            // print the Float value
            System.out.println("\nFloat Value at index 0: " + value0);
  
            // Reads the float at the index 1 of the floatbuffer
            // using get() method
            float value1 = fb.get(1);
  
            // print the Float value
            System.out.println("\nFloat Value at index 1: " + value1);
  
            // Reads the float at the index 2 of the floatbuffer
            // using get() method
            float value2 = fb.get(2);
  
            // print the Float value
            System.out.println("\nFloat Value at index 2: " + value2);
        }
  
        catch (IllegalArgumentException e) {
  
            System.out.println("\nIllegalArgumentException catched");
        }
  
        catch (IndexOutOfBoundsException e) {
  
            System.out.println("\nReadOnlyBufferException catched");
        }
  
        catch (BufferUnderflowException e) {
  
            System.out.println("\nException throws : " + e);
        }
    }
}
Output:
Original FloatBuffer:  [8.56, 9.61, 6.61]

Float Value at index 0: 8.56

Float Value at index 1: 9.61

Float Value at index 2: 6.61

Examples 2:




// Java program to demonstrate
// get() method
  
import java.nio.*;
import java.util.*;
  
public class GFG {
  
    public static void main(String[] args)
    {
  
        // Declaring the capacity of the FloatBuffer
        int capacity = 3;
  
        // Creating the FloatBuffer
        try {
  
            // creating object of floatbuffer
            // and allocating size capacity
            FloatBuffer fb = FloatBuffer.allocate(capacity);
  
            // putting the value in floatbuffer
            fb.put(8.56F);
            fb.put(9.61F);
            fb.put(6.61F);
  
            // print the FloatBuffer
            System.out.println("Original FloatBuffer:  "
                               + Arrays.toString(fb.array()));
  
            // Reads the float at the index 0 of the floatbuffer
            // using get() method
            float value0 = fb.get(0);
  
            // print the Float value
            System.out.println("\nFloat Value at index 0: " + value0);
  
            // Reads the float at the index 1 of the floatbuffer
            // using get() method
            float value1 = fb.get(1);
  
            // print the Float value
            System.out.println("\nFloat Value at index 1: " + value1);
  
            // Reads the float at the index 2 of the floatbuffer
            // using get() method
            System.out.println("\nTrying to get the float"
                               + " of index greater than its limit ");
            float value2 = fb.get(4);
  
            // print the Float value
            System.out.println("\nFloat Value at index 2: " + value2);
        }
  
        catch (IllegalArgumentException e) {
  
            System.out.println("IllegalArgumentException catched");
        }
  
        catch (IndexOutOfBoundsException e) {
  
            System.out.println("Exception thrown: " + e);
        }
  
        catch (BufferUnderflowException e) {
  
            System.out.println("Exception throws : " + e);
        }
    }
}
Output:
Original FloatBuffer:  [8.56, 9.61, 6.61]

Float Value at index 0: 8.56

Float Value at index 1: 9.61

Trying to get the float of index greater than its limit 
Exception thrown: java.lang.IndexOutOfBoundsException

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